WCF RoutingService 如何将来自具有相同合同的两个不同 WCF 服务器的回调消息路由到客户端？

Question

我的 WCF 服务器的工作方式如下：您通过调用服务方法订阅它们，例如 Subscribe()。他们通过回调通道将结果发回给您，例如 MessageReceived(string message)。

我现在的问题是我只从一个服务端点获取回调消息，而不是两者。事实上，仅通过调试，我就看到我的第二个服务甚至没有收到请求。有谁知道问题是什么？这是我的代码（注意我在 serviceAddresses 字符串中有两个 net.tcp 地址）：

private void StartAggregatorHost(List<string> serviceAddresses)
{
        // Create a new service host for the routing service (note that RoutingService is a pre-defined Microsoft service model type which routes SOAP messages).
        aggregatorHost = new ServiceHost(typeof(RoutingService));

        // Set up the router address. A logger client will now connect to this address to get logged messages.
        string fqdn = System.Net.Dns.GetHostEntry("localhost").HostName;
        string routerAddress = string.Format("net.tcp://{0}:2099/LogAggregator", fqdn);

        // Set up our router binding.
        NetTcpBinding routerBinding = new NetTcpBinding(SecurityMode.None, true);
        routerBinding.SendTimeout = new TimeSpan(0, 1, 0);       
        routerBinding.ReceiveTimeout = new TimeSpan(25, 0, 0);
        routerBinding.MaxReceivedMessageSize = int.MaxValue;
        routerBinding.MaxConnections = int.MaxValue;
        routerBinding.ListenBacklog = int.MaxValue;
        routerBinding.ReliableSession.Enabled = true;
        routerBinding.ReliableSession.Ordered = true;
        routerBinding.ReliableSession.InactivityTimeout = new TimeSpan(15, 0, 0, 0);

        // Define the type of router in use. For duplex sessions like in our case, we want to use the IDuplexSessionRouter.
        Type contractType = typeof(IDuplexSessionRouter);

        // Add the endpoint that the router will use to recieve and relay messages. Note the use of System.ServiceModel.Routing.IDuplexSessionRouter.
        aggregatorHost.AddServiceEndpoint(contractType, routerBinding, routerAddress);

        // Create the endpoint list that contains the service endpoints we want to route to.
        List<ServiceEndpoint> endpointList = new List<ServiceEndpoint>();

        foreach (string serverAddress in serviceAddresses)
        {
            // Set up our server binding(s) for each server.
            NetTcpBinding serverBinding = new NetTcpBinding(SecurityMode.None, true);
            serverBinding.SendTimeout = new TimeSpan(0, 1, 0);
            serverBinding.ReceiveTimeout = new TimeSpan(25, 0, 0);
            serverBinding.MaxReceivedMessageSize = int.MaxValue;
            serverBinding.MaxConnections = 1;
            serverBinding.ListenBacklog = int.MaxValue;
            serverBinding.ReliableSession.Enabled = true;
            serverBinding.ReliableSession.Ordered = true;
            serverBinding.ReliableSession.InactivityTimeout = new TimeSpan(15, 0, 0, 0);

            // Create the server endpoint the router will route messages to and from.
            ContractDescription contract = ContractDescription.GetContract(contractType);
            ServiceEndpoint server = new ServiceEndpoint(contract, serverBinding, new EndpointAddress(serverAddress));

            // Add the server to the list of endpoints.
            endpointList.Add(server);
        }

        // Create a new routing configuration object.
        RoutingConfiguration routingConfiguration = new RoutingConfiguration();

        // Add a MatchAll filter to the Router's filter table. Map it to the endpoint list defined earlier. When a message matches this filter, it will be sent to the endpoint contained in the list.
        routingConfiguration.FilterTable.Add(new MatchAllMessageFilter(), endpointList);

        // Attach the behavior to the service host.
        aggregatorHost.Description.Behaviors.Add(new RoutingBehavior(routingConfiguration));

        // Open the service host.
        aggregatorHost.Open();



        m_eventLog.WriteEntry(string.Format("Log aggregator service hosted at {0}.", routerAddress), EventLogEntryType.Information);

}

所以再一次......这就是我想要的：

CLIENT ---REQ---> ROUTER ---REQ---> SVC1
                         ---REQ---> SVC2

CLIENT <---CALLBACK1--- ROUTER <---CALLBACK1--- SVC1
       <---CALLBACK2---        <---CALLBACK2--- SVC2

这就是我得到的（即使我向路由器添加了第二个服务，它似乎甚至没有调用它的服务方法）：

CLIENT ---REQ---> ROUTER ---REQ---> SVC1

CLIENT <---CALLBACK--- ROUTER <---CALLBACK--- SVC1

Answer 1

您应该设置一个特定的优先级，将 SVC1 和 SVC2 添加到 FilterTable。

routingConfiguration.FilterTable.Add(new MatchAllMessageFilter(), new List<YourServiceType> { yourService }, 1);

更多信息here。